5. Jack said he (return) the two books to the library in a week.

4. —Will you ever leave her alone?

—Only if she (ask) me to.

3. The law of gravity (discover) by Isaac Newton about 350 years ago.

2. If you need our new programme list. I'll be happy (send) you one. Please leave your e-mail address here.

                   B

1. Don' t  worry about your boy too much. His temperature (drop) back to normal if he takes this medicine.

8. It's a fact that the elderly (take) good care of in the home of the elderly.

7. The Women's World Cup (not begin) until 1991 when China hosted it in Guangzhou.

6. If those wild animals can't find enough food,they (die) or have to leave their habitat(栖息地) soon.

5.- Will you come and pick me up tomorrow morning?

一Yes,I (promise) .

4. —Is everybody here?

— No,sir. Jim (not arrive) yet. He is still on the way.